Early Admission of Privileged Blocks: Increasing Efficiency of Time-Sensitive Blockchain Applications Using Reputation and Smart Markers
Blockchain systems often incur high inclusion latency due to validation and finality pipelines, limiting the performance of time-sensitive applications. We present Early Admission (EA), an overlay mechanism that reduces time-to-inclusion by allowing blocks from high-reputation proposers to become provisionally ledger-visible after partial validation. EA uses smart markers to record the provisional status and to support secure, auditable updates once the full validation is complete, and the final commitment remains governed by the underlying consensus. In an event-driven simulator spanning three high-throughput archetypes (Hedera-like, Redbelly-like, and Fabric-style), we find that EA can reduce mean time-to-inclusion by up to 65% under consistent resource assumptions, saturated demand, and bounded in-flight pipeline depth. To show that EA is robust against collusion attacks, we model adversarial incentives as a two-player game and show that collusion becomes economically unattractive when the EA-stage detection rate of early-admitted malicious blocks exceeds approximately 94%, which provides guidance for configuring EA thresholds and penalties.